2001 Chevy Truck V8 Two Wheel Drive Automatic 106000 miles
2001 Chevy 2500 HD 6.0 liter. Battery will go dead after sitting for 2 + days. Battery will charge and engine will start. Engine cranks slow if sits over night, engine will start and run or acellerator needed to keep running at 1,000 rpm for about 1 minute and idle and drive fine. Tow /haul will come on and not turn off at start up or Tow/haul will not activate at all as well. Battery is 1 month old, speced to the vehile. Alternator has been tested and ok, puts out 14.65 volts at start up. All positive and negative connections at the battery, engine, starter, fuse center under the hood, chasis and all other found ground and positive connections have been cleaned and tight. All fuses have checked with meter and all good. AT No Time does the CHECK ENGINE LIGHT come on.
I can drive the truck for a day (10-200 miles) and have no issues at start up or it will crank over slow, start and run fine but in tow/haul or not in tow/haul. Tow Haul mode will not work, it will only only activate at start uip on it's own at times and It will not turn off.
Any suggestions? All I have heard from people is the computer, Chevy dealers say it is not and want 90-100 dollars an hour to diagnose, and we all know how much that will eventually cost.
FYI I am a marine diesel technician for the past 15 years, 9-1100 hp range, mechanicle and common rail fuel systems, not an auto mechanic so I am at al little bit of a disadvantage when it comes to vehicles.
Best regards, Roger
No, I do not have On Star. I also do not have a beacon switch as a dealer suggested.
This will happen with all equipment turned off, radio, fan, etc. I have not used the factory security and it still happens.
I have no after market add ons/ up grades installed. The truck is the same as the day I purchased it new in 2001, stock. Thanks, any other questions, please ask. Roger
Saturday, November 28th, 2009 AT 9:12 AM